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IENWG

THE IHO & EUROPEAN UNION NETWORK WORKING GROUP

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Importance of Hydrography

Definition of Hydrography Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defence, scientific research, and environmental protection. In addition to supporting safe and efficient navigation of ships, hydrography underpins almost every other activity associated with the sea, including: - resource exploitation - fishing, minerals,.. - environmental protection and management - maritime boundary delimitation - national marine spatial data infrastructures - recreational boating - maritime defence and security - tsunami flood and inundation modelling - coastal zone management - tourism - marine science

S-100 Implementation Strategy

Last Update : 26 November 2025

AGL& RsWG

African Great Lakes & Rivers Sub-Working Group

MEETINGS AFTER 2024

List of the South West Pacific Hydrographic Commission Meetings Note: To access the meeting page, you'll need an IHO Portal account. If you don't have one yet, don't worry! Creating an account is easy. Simply follow the instruction provided at the link here to set up your account and gain access to the meeting page. Click the IHO Portal to get started

MSDIWG10 (2019)

10th MSDIWG Meeting Busan, Republic of Korea, 4 - 5 March 2019 Followed by the OGC Marine DWG Meeting, 6 March 2019 Followed by the UN-GGIM WGMGI1 Meeting, 7 -9 March 2019 (by invitation only)

ECS PT meetings

List of ECS Project Team Meetings

Meetings

List of S-101 Project Team Meetings

IHO Crowdsourced Bathymetry Initiative

The International Hydrographic Organization (IHO) has a long history of encouraging the collection of crowdsourced depth data to help improve humanity’s understanding of the shape and depth of the seafloor. For over a century, maps of the ocean floor were created from depth measurements collected by vessels as they journeyed across the oceans. These “passage soundings” enabled the creation of progressively more detailed seafloor maps and digital data grids. Recently, systematic surveys with specialized ships have contributed to greatly increasing available data. Unfortunately, despite the multitude of data that has been collected, to this day only 25% of the world’s ocean depths have been measured; the rest of the data used to compile seafloor maps are estimated depths.